global warming current

Updated on December 14, 2009

Muir and Reggs Glaciers

Global Warming

Global Warming

Definition :- Global warming is the increase in the average temperature of the Earth’s near surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 0.180C (1.33 0.320F) between the start and end of the 20th century. Today Global Warming is such a natural and man made crisis arise before human being. Our Earth is in danger.

Main Effects of Global Warming

There are two main effects of Global Warming

Increase in the temperature of the earth by about 30C to 50C (5.4° to 9° Fahrenheit) by the year 2100.

Rise in the sea level by at least 25 meters (82 feet) by the year 2100.

Secondary effects of global warming :

Increasing global temperatures are the primary effects of global warming. However they are causing a broad range of additional, secondary effects :

Sea levels are rising due to thermal expansion of the ocean, in addition to melting of land ice.

Amounts and patterns of precipitation are changing. The total annual power of hurricanes has

already increased markedly since 1975 because their average intensity and average duration have increased (in addition, there has been a high correlation of hurricane power with tropical sea-surface temperature).

Changes in temperature and precipitation patterns have also global effects on extreme weather events: They increase the frequency, duration, and intensity of floods, droughts, heat waves, and tornadoes. Other effects of global warming include higher or lower agricultural yields, further glacial retreat, reduced summer stream flows, species extinctions. As further effects of global warming, diseases like malaria are returning into areas where they have been extinguished earlier.

Causes of Global Warming

Global Warming is caused by several things, which include man-made and natural causes.

Natural Causes

Natural Causes are causes that are created by nature. One natural cause is a release of methane gas from arctic tundra and wetlands. Methane is a greenhouse gas and a very dangerous gas to our environment. A greenhouse gas is gas that traps heat in the earth’s atmosphere. Another natural cause is that the earth goes through a cycle of climate change. This climate change usually lasts about 40,000 years.

Man-made Causes of Global Warming

There are many man-made causes of Global Warming. Some of them important causes are

1) Pollution is one of the most biggest man-made problem. Pollution is caused by burning of fossil fuels made of organic matter such as coal, oil. When fossil fuels are burned in the atmosphere it gives out Carbon Dioxide CO2 . These gases affects the Ozone Layer. Ozone layer protect direct contact between ultraviolet radiations and our planet. Due to these harmful gases the Ozone Layer becomes thinner and thinner.

2) Also mining of coal and oil allows methane to escape. Methane is naturally in ground. When coal and oil is mined we have to dig up the earth. When we dig up the earth, the fossil fuel Methane escape in to the atmosphere.

3) Another man-made cause is population. More is the population, more food is required and also more is the methods of transportation. It arises more evolution of these harmful gases.

4) CO2 contributes more to Global Warming, the increase in the population increase the problem worse because we breathe out CO2. In our nature trees convert our CO2 in to oxygen. But due to deforestation the number of tress are decreases day by day. Due to this there are no more trees to convert our CO2 in to Oxygen.

Preventive measures to stop Global Warming

Drive a fuel-efficient car.

Reduce driving speed and drives evenly.

Control the hot water heater temperature.

Seal and insulate our duct systems.

Switch to green power.

Choose an energy efficient products with less packaging.

Replace regular bulbs with compact fluorescent bulbs.

Plant more trees and avoid deforestation.

Unplug electronics when they are not in use, because they still take up energy. At the very least, turn items off when they’re not being used.